一种离子迁移谱检测乳酸的定量分析方法
By employing dopant-free photoionization ion mobility spectrometry and isopropanol dissolution and dilution methods, the sensitivity and system adsorption problems of lactic acid detection have been solved, achieving high sensitivity and accurate quantitative analysis, which is suitable for the detection of lactic acid in baijiu (Chinese liquor).
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
- Filing Date
- 2022-06-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing ion mobility spectrometry techniques suffer from insufficient sensitivity and system adsorption problems in lactic acid detection, and dopant doping leads to unstable quantitative analysis, making it difficult to accurately quantify lactic acid in baijiu.
The dopant-free photoionization mobility spectrometry technique is used. The sample is dissolved or diluted with isopropanol, and the lactic acid concentration is detected by photoionization mobility spectrometry. The concentration is calculated by fitting a standard curve equation. The liquid direct injection thermal desorption injector and carrier gas purging are used to avoid interference from dopant reagents.
It improves the sensitivity and accuracy of lactate detection, avoids the instability of dopant reagent, achieves a minimum detection limit of 0.5 ng/μL and a quantitative analysis range of 1-10 ng/μL, and reduces matrix interference and lactate residue.
Smart Images
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